Potential Energy (PE Problems: 6. A rock of mass 2.2 kg is held 8 meters above the ground. Calculate the gravitational potential energy. 7. A 15 kg object is placed on a shelf 3.5 meters high. Find its potential energy. 8. A 3 kg book is placed on a table that is 7 meters above the floor.What is the potential energy of the book? 9.A 55 kg crate is lifted 5 meters in the air. Calculate the potential energy of the crate. 10. A 0.9 kg bird is perched on a tree 6 meters above the ground. What is the gravitation potential energy of the bird?

Here are the solutions to the potential energy problems:<br /><br />**Formula:** Gravitational Potential Energy (PE) = mgh<br /><br />Where:<br />* m = mass (in kg)<br />* g = acceleration due to gravity (approximately 9.8 m/s²)<br />* h = height (in meters)<br /><br />**Problem 6:**<br /><br />* m = 2.2 kg<br />* g = 9.8 m/s²<br />* h = 8 m<br /><br />PE = (2.2 kg) * (9.8 m/s²) * (8 m) = 172.48 Joules<br /><br />**Problem 7:**<br /><br />* m = 15 kg<br />* g = 9.8 m/s²<br />* h = 3.5 m<br /><br />PE = (15 kg) * (9.8 m/s²) * (3.5 m) = 514.5 Joules<br /><br />**Problem 8:**<br /><br />* m = 3 kg<br />* g = 9.8 m/s²<br />* h = 7 m<br /><br />PE = (3 kg) * (9.8 m/s²) * (7 m) = 205.8 Joules<br /><br />**Problem 9:**<br /><br />* m = 55 kg<br />* g = 9.8 m/s²<br />* h = 5 m<br /><br />PE = (55 kg) * (9.8 m/s²) * (5 m) = 2695 Joules<br /><br />**Problem 10:**<br /><br />* m = 0.9 kg<br />* g = 9.8 m/s²<br />* h = 6 m<br /><br />PE = (0.9 kg) * (9.8 m/s²) * (6 m) = 52.92 Joules<br />